Scenario 1: Your aunt Clara has been gaining some weight in the past few years. She attributes this to increasing work commitments and the lack of time to exercise and shop for healthy food. She has been looking online and has been thinking of commencing a new natural herbal appetite […]

A promoter is a DNA sequence that is upstream of a gene. Promoters comprise about 35 base pair consensus sequences that are required for transcription initiation. The figure from the textbook shows the positions of the consensus sequences in a promoter: Predict and explain the possible effect of a mutation […]

Q1. Single-stranded DNA molecules are said to be anti parallel while they are aligned next to each other but oriented in opposite directions. Q2. A series of enzymes catalyze the reaction X Y Z A. Product A binds to the enzyme that converts X to Y at the position remote […]

Coat color in cats is a codominant trait and is also located on the X chromosome. Cats can be black, yellow or calico. A calico cat has black and yellow splotches. In order to be calico, the cat must have an allele for the black color and an allele for […]